public class MainMain {
    public static void main(String[] args) {
        String str = "你好，新冠病毒疫情 ABCDFFD ";// 把所有的小写字母 编程
        String reg = "新冠|病毒";//"[\\u4E00-\\u9FA5]{1}";
        System.out.println(str.replaceAll(reg, "#"));
     /*   int start = 0x4E00;
        int end = 0x9FA5;
        System.out.println(end - start +1 );*/
       /* for (int i = start; i <= end; i++) {
            System.out.print((char)i+" ");
            if(i%50==0){
                System.out.println();
            }
        }*/


    }



}
